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Calcite & Pyrolusite

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NST711738

Calcite & Pyrolusite

Description Tabs

Description
Locality: 
Donnerkuhle Quarry, Hagen, Arnsberg, North Rhine - Westphalia, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.8 × 2 cm
Description

Rhombohedral Calcites with inclusions of Fe- and/or Mn-Oxides and small metallic Pyrolusites.

Mineral Data
What's on the rock

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5